Nathan schwab



(No Model.)

N. SCHWAB.

GAS TRAP COVER.

Patented M31. 1, 1887. iv-

H. PETERS. Phn'oljlhographer. WalhinpnnD. C.

llnrrnn fira'rns Parana: Urrrcn.

NATHAN SCHlVAB, OF NEW YORK, N. Y.

GAS TRAP COVER.

SPECIFICATION forming part of Letters Patent No. 358,576, dated March 1, 1887.

Application filed January 8, 1887. Serial No. 223,777. (No model.)

To all whom it may concern:

Be it known that I, NATHAN ScHwAB, a citi zen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and usefulImprovementsin Gas-Trap Covers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form part of this specification.

7 "that class of stationary wash-basins located in My invention relates to an improvement on that class of gas-trap covers for wash-basins, chambers, closets, and the like containing noxious and poisonous gases, which is adapted to seal the basins or other vessels to prevent the escape of such poisonous gases into the bed-chambers or other apartments of the house.

More especially is my device intended for sleeping-apartments and connected with the streetsewer to prevent the flow of poisonous gas into the house from the sewer; and it consists in the construction hereinafter described, and more particularly pointed out in the claims.

Heretofore many kinds of diseases-such as fevers, malaria, and other low types have been contracted in the sleeping-apartments from the escape of sewer-gas through the pipes connecting the wash-basin with the main sewer in the street; and the object of my invention is to provide an improved safetycover that can be adjusted to any of the ordinary-sized basins and to be so tightly secured in the upper part of the basin as to form an air'tight trap, rendering the escape of gasimpossible until the cover is removed.

Referring to the drawings, Figure 1 is a perspective view of the under side of my improved cover ready for use. Fig. 2 isa vertical sectional view on the line 00 m of Fig. 1, showing the cover right side up and the parts in position when inserted in the basin or other vessel. Fig. 3 represents a front view of the cam-locking device on the top of the cover. Fig. 4 is an enlarged detailed view of the same with the cam removed. Fig. 5 is an enlarged detail view of the spreading device of the band. Fig. 6 represents a modified form of the gasket or packing extending over the entire under side of the cover, as shown in dotted lines in Fig. 2.

Likeletters of reference refer to corresponding parts in each figure of the drawings.

A represents the cover, composed of sheet metal, as copper, brass, white-metal, or other suitable kinds adapted for the purpose, of sufiicient size to cover the top of the largest ordinary washbasin or other vessel upon which it is desired to be used.

On the under side of the cover there is secured a vertical rim, B, extending downward within the circumference of the horizontal flange c on the edge of the cover, adapted to fit within the top of the basin, while the horizontal flange rests upon its top.

The central portion of .the cover is spun or stamped up to form a cone, 0, on its upper side, upon which is secured a funnel-shaped extension, D. Within the center of the cone 0 there is a tube, E, which extends upward through the center of the extension D a sufficient distance above to form ahandle, by which the coveris moved. At a short distance above the extended portion of the cone the walls of the tube are removed on its front and rear sides, leaving an opening, 6, which extends to its top. Near the bottom of this opening, at the front and rear, asupporting-bar, F, extends across the opening, and is dovetailed into the sides of the tube atf. The top portions of the sides of the tube terminate in thickened lugs G, through which a pin, g, is passed, carrying upon it and between the lugs a cam, H, recessed in its sides h, and having its edge or periphery serrated at i, and provided with a handle, I, by which it is operated. \Vithin the tube E there is a piston-rod, J, that is adapted to be moved up and down through the sleeve K, and to operate the device below for securing the cover in the basin.

The top of the piston-rod J has a forked head, L, fitting within the walls of the tube, and Within the lower portion and extending across the head thereof is placed a roller, Z, journaled in thefork, and on the inner top portions of the forked head are separately journaled rollers M, that set in the recess h on each side of the cam, and turn upon the inner portion of its rim as the rod J is being raised, while the outer or serrated edge moves upon and turns the roller Z in the lower part of the ers M to pass out through the recesses m of.

the rim of the cam. (Shown in dotted linesin Fig. 2.)

Within the tube E, below the sleeve K, there is placed an elasticpacking, 7c, of rubber, felt, leather, or other suitable material, which tightly surrounds the piston rod J, with its.

lower end resting on a perforated disk, N, which covers the lower end of the tube, and is secured to the inside of the cone 0. At one side of theperforated disk, in the upperinside of the cone 0, there is secured a lug, n, which has pivolally connected therewith a lever-arm, O, the short arm 0 of which is provided with a stud in its free end that works in a slot, 12, in a sleeve, P, secured to the lower end of the piston-rod J. The long arm 0 of the lever is pivotally connected at its free end to a brace, Q, which extends at substantially right angles thereto, and is pivotally connected to an eye, g, on the side of the adjustingrod R, that extends across under the side of the cone 0. One end of the adjusting-rod R is provided with a double head, 1", in which is pivoted arms S, that gradually diverge from each other as they distance from the head, and pass through a long slot, 1;, in the rim B on the under side of the cover, and are pivoted in slottedlugs t, which are secured to an adjustable band, T, near its free ends, that surrounds the rim B.

Between the arms S there is a post, 'U, fastened to the side of the slotted rim B, which has pivoted therein spreader-arms u, which are also pivoted to the arms S at about midway their length. The opposite free end of the adjusting-rod R works through a slot in the lower end of a stud, WV, which is secured to the under side of the cone 0. Surrounding this stud there is a coiled spring, to, having curved ends, which loosely pass through the ends of angle-arms 1, which are secured to the adjustableband T through slots in the rim B, on nearlythe opposite side of the cover from the arms S.

The adjustable band T is of sufficient length to enable its ends to overlap when extended, andhas surrounding it anelasticgasketor ring, V, of rubber, cork, felt, papier-mach, or other suitable material adapted to be expanded as the band is enlarged or crowded outward until it comes in contact, and forms an air-tight joint with the sides of the basin or vessel in which it is inserted. This gasket or ring V may be formed, as shown at o in Fig. 6 and in dotted lines in- Fig. 2, extending over the entire under side of the cover, to serve as a greater security against the escape of gas through the packing 7c,surrounding the piston-rod when it is slightly compressed and worn. The extended sheet a of the gasket is reenforced by rings 4; in its body of the same material and in the same piece therewith, to give itstrength and solidity, audit is adapted toextend over the expanding mechanism within the cover, and may be used, if desirable, as a substitute for the packing is within the tubeEto prevent the escape of. gas through the cover into the apartment.

In operation the rim B ofthe cover is placed within the top of the basin or vessel, the adj ustable band T being contracted around the rim and the lugs t,and the angle-armsy setting into the slots of the rim when the handle of the cam H is forced downward, depressing the piston-rod and short arm 0 of the lever, thereby forcing the long arm 0 toward the side of the cover, carrying with it, through the brace Q, the adjusting-rod R, which crowds the arms S outward upon the band. The arms S are septhe basin, forming therewith an air and gas tight cover. The cover is removed by reversing the action of the cam and releasing the parts.

Having fully described my invention, what .I claim as new, and desire to secure by Letters Patent of the United States, is-

1. The combination, with a gas-trap cover having a piston-rod through its center for operating an angle-arm on the under side to expand an adjustable band by means of an adjusting-rod on the outside of the rim, of an elastic gasket or packing to prevent the escape of gas through the center of the cover, as and for the purpose set forth.

2. A gas-trap cover provided with a pistonrod in atube in the cover, in combination with an angle-lever arm having a stud in its short arm working in a slot in a sleeve in the lower end of the rod, and its long arm pivoted to a brace secured to an adj us ting-rod,and suitable interposed mechanism adapted to expand a band outside the rim, and a gasket or packing to prevent the escape of gas through the cover, as and for the purpose set forth.

3. The combination, with a gas-trap cover having mechanism for expanding an adjustable band on the outer side of a rim on its under side, of a gasket around the adjustable band and extending over the entire underside of the cover, as and for the purpose set forth.

. 4. The combination, witha gas-trap coverfor wash-basins and other vessels, having a slotted rim on its under side and an adjustable band outside the rim, provided with a gasket, of a cam secured on the upper side of said cover, a piston-rod and a lever-arm,and suitable eonneeting means, whereby the adjustable band is forced outward against the sides of the basin as and for the purpose set forth.

5. The combination, with a gastrap cover having a conical projection on its upper side, with a tube therein, of a piston-rod within the tube, having a forked head carrying a cam to move the piston up and down to operate an angle-arm pivoted to the lower end of the piston, and connected with a rod and suit-able connections for forcing an adjustable band out ward against the sides of a basin, as and for the purpose set forth.

6. The combination, with a gas-trap cover having a piston-rod therein connected with a lever'arm and suitable connecting means to expand an adjustable band, of a cam-lever recessed in its sides, with rollers on the head of the rod working within the recesses and upon the rim of the cam in moving the rod up and down, as and for the purpose set forth.

7. The combination,withaconieal cover hav ing a tube in the cone,provided with openings in its front and rear portions, and a cam-lever recessed in its sides pivoted in the upper'end of the tube, of a pistonrod having a forked head with a roller journaled in its lower part, and rollers at the top and on the inner sides of the forked head adapted to work in the recess on each side of the cam to move the rod up and down, as set forth.

8. A gas-trap cover having a conical top and a piston-rod therein, and an angle-arm pivoted to the cone, with a stud in the end of its short arm working in a slot in a sleeve on the end of the piston-rod, and its long arm pivoted to a brace attached to an adjustingrod provided at one end with a double head carrying pivoted arms that extend through the slots in the rim and are pivoted to the adjustable band outside thereof, as set forth.

9. The combination, with a gas-trap cover having an adjustable band outside the rim, of an adjusting-rod having arms pivoted to its end, and passing through slots in the rim and pivoted to the band at near its end, and sp readers pivoted between said arms to a post on the side of the rim and to the arms at about midway their length, as set forth.

10. The combination, with a gas-trap cover having an adjustable band outside the rim and an adjusting-rod working through a slot in a stud depending from the cone at one end and having spreader-arms pivoted to the other end, of aspringsecured to the stud with curved arms working through slots in angle-arms on the adjustable band, which extend through slots in the rim, as set forth.

In testimony whereof I affix my signature in presenee of two witnesses.

NATHAN SGHXVAB.

\Vituesses:

BENTON COHEN, HENRY NAEF. 

